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d0606 ms im 20060327-s0004 / 21604tn (ot) no. 7498-1/20 overview the lb11923v is a pre-driver ic designed for variable-speed control of 3-phase brushless motors. it can be used to implement a motor drive circuit with the desired output capacity (voltage, current) by using discrete transistors for the output stage. it implements direct pwm drive for minimal power loss. since the lb11923v includes a built-in vco circuit, applications can control the motor speed arbitrarily by varying the external clock frequency. function direct pwm drive output speed discriminator + pll speed control circuit speed lock detection output built-in crystal oscillator circuit forward/reverse switching circuit braking circuit (short braking) full complement of on-chip protection circuits, including lock protection, current limiter, and thermal shutdown protection circuits. ordering number : enn7498a parameter symbol conditions ratings unit maximum supply voltage v cc max 8v maximum input current i reg max v reg pin 2 ma output current i o max uh, vh, wh, ul, vl, and wl outputs 30 ma allowable power dissipation 1 pd max1 independent ic 0.62 w allowable power dissipation 2 pd max2 * when mounted on the specified pcb 1.79 w operating temperature topr ?0 to +80 ? storage temperature tstg ?5 to +150 ? specifications absolute maximum ratings at ta = 25? sanyo semiconductors d ata sheet any and all sanyo semiconductor products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. consult with your sanyo semiconductor representative nearest you before using any sanyo semiconductor products described or contained herein in such applications. sanyo semiconductor assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all sanyo semiconductor products described or contained herein. tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan lb11923v monolithic digital ic three-phase brushless motor driver * specified pcb : 114.3 76.11.6 mm glass epoxy pcb
no. 7498-2/20 lb11923v parameter symbol conditions ratings unit supply voltage v cc 4.4 to 7.0 v input current range i reg v reg pin (7 v) 0.2 to 1.5 ma fg schmitt output applied voltage v fgs 0 to 7 v fg schmitt output current i fgs 0 to 5 ma lock detection applied voltage v ld 0 to 7 v lock detection output current i ld 0 to 20 ma allowable operating ranges at ta = 25?c parameter symbol conditions ratings unit min typ max i cc 12129.5ma supply current i cc 2 in stop mode 2.3 3.3 ma i cc 3v cc = 5 v 20 28 ma i cc 4v cc = 5 v, in stop mode 2.1 2.9 ma output saturation voltage 1-1 v o sat1-1 at low level: i o = 400 a 0.1 0.3 v output saturation voltage 1-2 v o sat1-2 at low level: i o = 10 ma 0.8 1.2 v output saturation voltage 2 v o sat2 at high level: i o = e20 ma v cc e 1.2 v cc e 0.9 v [hall amplifier] input bias current i hb(ha) e2 e0.1 a common-mode input voltage range 1 v icm 1 when hall-effect sensors are used 0.5 v cc e 2.0 v common-mode input voltage range 2 v icm 2 when one-side biased inputs are used 0v cc v (hall-effect ic applications) hall input sensitivity sine wave 100 mvp-p hysteresis ?
no. 7498-3/20 lb11923v parameter symbol conditions ratings unit min typ max [current limiter operation] limiter v rf 0.235 0.260 0.285 v [thermal shutdown operation] thermal shutdown operating temperature ttsd design target value * 150 180 ?c hysteresis ? ?
no. 7498-4/20 lb11923v parameter symbol conditions ratings unit min typ max [s/s pin] input high-level voltage v ih(s/s) v cc = 6.3 v, 5 v 2.0 v cc v input low-level voltage v il(s/s) v cc = 6.3 v, 5 v 0 1.0 v input open voltage v io(s/s) v cc e 0.5 v cc v hysteresis ? ? ? ? ? ? ? ? ? ? ? ?
no. 7498-5/20 lb11923v e20 0 20 4 06080100 1.002 w 0.347 w 0 0.5 1.0 1.5 2.0 ilb01550 ambient temperature, ta e c pd max e ta allowable power dissipation, pdmax e w mounted on the specified pcb (114.3 76.1 1.6 mm glass epoxy pcb) 1.79 w 0.62 w independent ic pin assignment 23 top view 22 24 21 25 20 26 19 27 18 28 17 29 16 30 15 31 14 32 13 33 12 34 11 35 lb11923v 10 36 9 37 8 38 7 39 6 40 5 41 4 42 3 43 2 44 in1+ in1e in2+ in2e in3+ in3e v cc 1 v cc 2 wh wl vh vl uh ul gnd2 gnd1 rf rfgnd nc fgout fgine fgin+ vreg s/s clk f/r br n1 n2 fgs ld dout pout nc int.ref int.in int.out toc pwm nc fil r c csd 1 package dimensions unit : mm (typ) 3277 sanyo : ssop44(275mil) 7.6 15.0 0.65 5.6 (0.68) (1.5) 44 23 1 22 0.22 0.5 0.2 0.1 1.7max
no. 7498-6/20 lb11923v speed discriminator count and vco divisor n1 n2 count divisor high or open high or open 1024 1024 high or open low 1024 512 low high or open 256 256 low low 512 512 f fg = (divisor ? count) f clk three-phase logic truth table (a high (h) input is the state where in + > in e .) item f / r = l f / r = h output in1 in2 in3 in1 in2 in3 pwm ? 1hlhlhlvhul 2h lllhh wh ul 3hhlllhwhvl 4 lhlhlhuhvl 5lhhhlluhwl 6llhhhlvhwl s/s pin high or open stop low start br pin high or open brake low released
no. 7498-7/20 lb11923v block diagram e + e + n2 n1 logic vco pri driver logic hall hys amp csd osc f/r br comp 1/n tsd 1.3vref lvsd vreg clk ld curr lim pwm osc vco pll speed pll speed discri fg filter e + br in2+ in2e in3+ in3e wh vh uh wl vl ul toc rf pwm gnd n2 n1 r c fil vreg clk fgin+ fgine fgo fgs dout ld pout int ref int in int out s/s v cc v cc fr csd in1+ in1e fil rfgnd v cc s/s res
no. 7498-8/20 lb11923v pin no. pin functions equivalent circuit pin functions 1 vreg 7-v shunt regulator output 2 s/s start/stop control low: 0 v to 1.0 v high: 2.0 v to v cc goes high when left open. low for start. high or open for stop. the hysteresis is about 0.22 v. 1 v cc 1 v cc 1 3.5 k ? ? ? ? ? ?
no. 7498-9/20 lb11923v pin no. pin functions equivalent circuit continued from preceding page. 5br brake control (short braking operation) low: 0 v to 1.0 v high: 2.0 v to v cc goes high when left open. high or open for brake mode operation. the hysteresis is about 0.22 v. v cc 1 3.5 k ? ? ? ? ? ?
no. 7498-10/20 lb11923v pin no. pin functions equivalent circuit continued from preceding page. 10 dout speed discriminator output acceleration ? ? ? ? ?
no. 7498-11/20 lb11923v pin no. pin functions equivalent circuit continued from preceding page. 17 pwm pwm oscillator frequency setting. connect a capacitor between this pin and ground. 7.5 k ? ? ? ? ?
no. 7498-12/20 lb11923v pin no. pin functions equivalent circuit continued from preceding page. 22 csd sets the operating time of the constrained-rotor protection circuit. reference signal oscillator used when the clock signal is cut off and to prevent malfunctions. the protection function operating time can be set by connecting a capacitor between this pin and ground. this pin also functions as the logic circuit block power-on reset pin. v cc 1 300 ? ? ? ? ? ? ? ?
no. 7498-13/20 lb11923v pin no. pin functions equivalent circuit continued from preceding page. 28 rf output current detection connect a resistor between this pin and ground. the output limitation maximum current, i out , is set to be 0.26/r f by this resistor. v cc 1 28 29 gnd1 control block ground 31 33 35 32 34 36 v cc 2 50 k ? ? ?
no. 7498-14/20 lb11923v sample application circuit 1 (p-channel + n-channel, hall-effect sensor application) lb11923v 44 43 42 41 40 39 36 35 34 33 31 30 29 28 27 13 14 15 16 17 18 19 20 21 nc c vreg pwm r fil toc int.out 9 8 7 6 5 4 3 2 1 ld fgs pout dout f/r clk n2 n1 s/s 10 38 22 37 br csd 11 12 26 25 32 int.in int.ref 24 23 nc vl fgine in1+ rf fgout nc gnd1 gnd2 wh v cc 2 vh wl in2e in2+ v cc 1 in3e in1e in3+ fgin+ ul uh rfgnd s/s clk f/r br ld n2 fgs n1 24 v + + top view
no. 7498-15/20 lb11923v sample application circuit 2 (pnp + npn, hall-effect sensor application) lb11923v 44 43 42 41 40 39 36 35 34 33 31 30 29 28 27 13 14 15 16 17 18 19 20 21 nc c vreg pwm r fil toc int.out 9 8 7 6 5 4 3 2 1 ld fgs pout dout f/r clk n2 n1 s/s 10 38 22 37 br csd 11 12 26 25 32 int.in int.ref 24 23 nc vl fgine in1+ rf fgout nc gnd1 gnd2 wh v cc 2 vh wl in2e in2+ v cc 1 in3e in1e in3+ fgiin+ ul uh rfgnd s/s clk f/r br ld n2 fgs n1 24 v + + top view
no. 7498-16/20 lb11923v ic operation description 1. speed control circuit this ic implements speed control using the combination of a speed discriminator circuit and a pll circuit. the speed discriminator circuit outputs (this counts a single fg period.) an error signal once every two fg periods. the pll circuit outputs an error signal once every one fg period. as compared to the earlier technique in which only a speed discriminator circuit was used, the combination of a speed discriminator and a pll circuit allows variations in motor speed to be better suppressed when a motor that has large load variations is used. the fg servo frequency (ffg) is determined by the frequency relationship shown below and by the clock signal (fclk) input to the cclk pin. f fg = (vco divisor ? speed discriminator count) f clk therefore it is possible to implement half-speed control without switching the clock frequency by using combinations of the n1 = high, n2 = low state and other setting states. 2. vco circuit the lb11923v includes a built-in vco circuit to generate the speed discriminator circuit reference signal. the reference signal frequency is given by the following formula. f vco = f clk divisor f vco : reference signal frequency f clk : externally input clock frequency the range over which the reference signal frequency can be varied is determined by the resistor and capacitor components connected to the r and c pins (pins 20 and 21) and by the vco loop filter constant (the values of the external components connected to pin 19). to acquire the widest possible range, it is better to use 6.3 v than 5 v as the supply voltage. it is also possible to handle an even wider range than is possible with fixed counts by making the speed discriminator count and the vco divisor switchable. the components connected to the r, c, and fil pins must be connected with lines to their ground pins (pins 29 and 30) that are as short as possible. 3. output drive circuit to reduce power loss in the output, this ic adopts the direct pwm drive technique. the output transistors (which are external to the ic) are always saturated when on, and the motor drive output is adjusted by changing the duty with which the output is on. the pwm switching is performed on the high side for each phase (uh, vh, and wh). the pwm switching side in the output can be selected to be either the high or low side depending on how the external transistors are connected. 4. current limiter circuit the current limiter circuit limits the (peak) current at the value i = v rf /r f (v rf = 0.26 v (typical), r f : current detection resistor). the current limitation operation consists of reducing the output duty to suppress the current. high accuracy detection can be achieved by connecting the rf and rfgnd pin lines near the ends of the current detection resistor (rf). 5. speed lock range the speed lock range is 6.25% of the fixed speed. when the motor speed is in the lock range, the ld pin (an open collector output) goes low. if the motor speed goes out of the lock range, the motor on duty is adjusted according to the speed error to control the motor speed to be within the lock range. supply voltage r (k ?
6. notes on the pwm frequency the pwm frequency is determined by the capacitor (f) connected to the pwm pin. when v cc = 6.3 v: f pwm
no. 7498-18/20 lb11923v when v cc = 6.3 v: the set time (in seconds) is 37 c (f) when v cc = 5.0 v: the set time (in seconds) is 30 c (f) to clear the rotor constrained protection state, the application must either switch to the stop state for a fixed period (about 1 ms or longer) or turn off and reapply power. if the rotor constrained protection circuit is not used, a 220 k ?
17. integrating amplifier the integrating amplifier integrates the speed error pulses and the phase error pulses and converts them to a speed command voltage. at the same time it also sets the control loop gain and frequency characteristics using external components. the integrating amplifier output (pin 15) is normally connected to the toc pin (pin 16) using external wiring. in cases where it is necessary to switch the integration constant in an application that uses a wide speed range by isolating the integrating amplifier output and the pwm control circuit, this type of constant switching application can be implemented by adding external operational amplifier, analog switch, and other components. in either case, the basic idea is that the operational amplifier output is connected to the toc pin. (note that voltages in excess of v cc e 0.5 v must not be applied to the toc pin.) 18. fil pin external components the capacitor inserted between the fil pin and ground is used to suppress ripple on the fil pin voltage. therefore, application designers must select a capacitance value that provides fully adequate smoothing of the fil pin voltage even at the lowest external clock input frequency used. also, the fil pin voltage convergence time (the time until the reference signal stabilizes) when the input clock frequency is switched is shortened by connecting a resistor and a capacitor in series between the fil pin and ground. therefore, designers must select values for the resistor and capacitor that give the required convergence time. 19. r and c pin external components the maximum range over which the reference signal frequency f vco can be varied when 5 v is used as the v cc supply voltage is about a factor of three. when it is desirable to make this range as wide as possible, since the values of the r pin external resistor (r) and the c pin external capacitor (c) are determined by the maximum value of the reference signal frequency (f vco 1) and the minimum value (v cc l) of the v cc power supply due to unit-to-unit variations, r and c can be determined using the following procedure as a reference. (1) calculate r1 and c1 using the following formulas and determine values for r and c such that the conditions r ? ?
ps no. 7498-20/20 lb11923v 20. nc pin since the nc pins are electrically open with respect to the ic itself, they can be used as intermediate connection points for lines in the pcb pattern. specifications of any and all sanyo semiconductor products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. sanyo semiconductor co., ltd. strives to supply high-quality high-reliability products. however, any and all semiconductor products fail with some probability. it is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. in the event that any or all sanyo semiconductor products (including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of sanyo semiconductor co., ltd. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equipment, refer to the "delivery specification" for the sanyo semiconductor product that you intend to use. information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. sanyo semiconductor believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. this catalog provides information as of december, 2006. specifications and information herein are subject to change without notice.

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